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Mumsnet has not checked the qualifications of anyone posting here. If you need help urgently or expert advice, please see our domestic violence webguide and/or relationships webguide. Many Mumsnetters experiencing domestic abuse have found this thread helpful: Listen up, everybody

Me and my partner and his ex affair partner.

65 replies

Suneptune · 06/09/2025 00:23

I have been with my partner for 9 months. I was married for 25 years and separated and then divorced 5 years ago when my ex informed me out of the blue (to my utter horror and complete shock) that he had slept with multiple women including at least one of his exes (who I considered a friend of mine) and with several women I knew. The divorce was brutal (him not me). I moved away and have not seen him since the separation 5 years ago. I had to make a new life. I did not know who to trust. Life as I knew it had ended. It was tough and lonely. I had a lot of therapy. I didn’t date.

i have always valued fidelity and honesty and my ex knew this. It was one of the reasons he married me he said. I have always said that I could never be with someone who cheated and even my friends I have realised are all faithful types. I suppose like attracts like. Famous last words.

My new partner on our first date told me that he had cheated on his wife 10 years ago and that they had recently divorced (married for 20). He said he was ashamed of his behaviour and regretted what he had done. So I decided to give us a chance. He was loving sweet tender to me.

I then found out that this affair lasted a year and that his affair partner had herself had several affairs during her marriage. The first man involved with her was absolutely “cut up” apparently by their affair ending and he was the second. She has been with her new partner for several years now. His wife found out a year after the affair and he chose to stay with her and their children.

Then he told me over the next few months firstly that he had cheated on his first wife who he was with for 10 years with a random woman who threw herself at him. He also had a fling with someone he met in a pub during his second marriage.

Lastly, I now know that he is still in contact with the affair partner who works for the same organisation as him though in a different office. I thought at first that they saw each other only every so often at the odd social event but it now transpires that last year, they both signed up for a voluntary project (with about a dozen others) and saw each other several times through this. Some weeks after the project was over the two of them then went to a blues club that they had gone to during their affair (her suggestion).

He then started to date me.

Then this summer they both signed up for another voluntary project. I was upset. He told me that she had moved on with her life when I asked what was going on. He said that he had the utmost respect for her in her professional life. He said I was the most important woman to him. He said he needed me to trust him. They saw each other (together with the rest of the team) two or three times a week for this project and there was a lot of socialising in pubs also. On the final very intense day of the project (there was a party afterwards), he didn’t text me at all and not even to say goodnight.

For the last few weeks I feel as if I have been on a choppy sea. He knows this and has said that it was a difficult time for me. He also said that just because I don’t see my ex and the people who betrayed me in my previous life, doesn’t mean that he can’t see her. I said to him that I do not mind him seeing his wives of course not. It was just that I was concerned about the affair partner and that I felt that she was a third party in our relationship. It seems to me (though I didn’t say this to him) that this woman was exactly the sort who my ex husband would have slept with. I don’t want her in my life. My partner told me some ugly details of how they conducted their affair which made me want to cry.

I wonder if he is less loving to me since the ending of the project (doesn’t use my nickname) and the tone of his texts seem to have changed though I could be reading too much into this. He says I am judging him and that he has changed. Do cheats change? Perhaps for him she’s the one who got away? What about the project next year? There’s other stuff but I have gone on enough.

OP posts:
MrsTerryPratchett · 06/09/2025 14:22

How do you trust your instincts? You don’t. You hope for the best, plan for the worst, never give more than you can afford to lose and DON’T blame yourself for other people being arseholes.

This one is an arsehole. So you dump and pat yourself on the back for both getting out there to date and getting out of it whe it turned out to be shit.

Something I like to say, every single relationship in the world ends badly. Every one. Because even the best relationships end in bereavement. Love is pain. You just enjoy the good bits while they’re happening. This was good, you enjoyed it, it’s not now.

Catpiece · 06/09/2025 14:22

No. No. No. Run for the hills.

NNforthispost · 06/09/2025 14:24

You’re nine months in which is fairly early. He’s not being respectful and seems to be trying to hurt you by telling you how he conducted his affair with this woman. WTAF?

I was once in love with someone. He told me, a year in, how he had cheated, not once, but several times. That was it for me - he had no morals. More than one instance of straying is a huge red flag,

Someoneshouldatoldme · 06/09/2025 14:48

@Suneptune Let her have him. They deserve each other. Why would you want to be the latest chapter in they sorry disgusting tale?Find people who share your values. He aint it.

GreenAndWhiteStripes · 06/09/2025 15:36

"How do you trust your instincts" - the best advice is to take it slowly. You don't really know someone IMO until you've been together for at least a couple of years. If you take things slowly and don't let yourself get too invested too soon, it's less of a disappointment if they let you down.

NeedToAskPlease · 06/09/2025 16:17

@Suneptune - you're never going to have peace of mind in this relationship because he's already broke your trust.

You'll forever be second guessing where he is, who's he with etc

Not a nice place to be in.

I really wish l had ended a situationship that broke my trust in the first couple of months as it caused me a lot of anxiety and MH issues.

Suneptune · 06/09/2025 18:03

The terrible thing for me also is how I have changed into an anxious suspicious overthinking wreck basically. With the marriage, I left as soon as my ex husband did his big revelation (remarkably he wanted me to stay in the marriage) so I ironically skipped this stage.

i know what I have to do but i am so sad about it all. As I nurse my wounds, the affair partner gets away with it as does he. I wish I believed in karma

OP posts:
frankiesgrace · 06/09/2025 18:08

@SuneptuneYou are not pathetic at all.

I was totally blindsided by my ex husbands deceit and overnight I lost my husband, father of my children and my best friend. To this day there are still moments when I think of how much life and moments we shared together and it is horrible.

The next guy (who sounds like a carbon copy of the guy you’re dating, including with the situation with the other woman) knew what I’d been through… and honestly, I don’t think I’ll ever forgive him for putting me through what he did (continuing to sleep with a woman who is in a long term relationship, despite assuring me he wasn’t).

My only mistake was believing his lies and seeing the best in him. But it rocked me to my core that people can be so dishonest and selfish.

It will hurt now to end it, but it will hurt so much more to keep it going, you’re never going to feel emotionally safe with this man and you will never truly flourish in the way you deserve to. Don’t let him charm his way back in, he has shown you who he is, and you deserve so much better.

Suneptune · 06/09/2025 18:17

Yes Frankiesgrace, I understand. My partner said several times that he knew I was “vulnerable”and knows what I went through. I wonder if this vulnerability made me into his victim now. Over thinking again. Must stop it. Onwards and upwards.

OP posts:
Sassylovesbooks · 06/09/2025 18:33

You have been badly burnt by your ex husband. Went through a difficult divorce, moved away and made a new life for yourself. You've dipped your toe back into dating, and met what you thought is a decent man. He's admitted to cheating on his first wife - only now you've discovered he's cheated more than once with multiple women. This isn't a one-off, this man is a serial cheater. Is he cheating with his ex-affair partner? Who really knows. It's possible, after all he has form. If he's a cheat, then he's a liar as well. You've only been together 9 months, and in all honesty considering the upset you went through with your husband, the time it's taken for you to pick up the pieces, don't waste your time and energy on this man. End the relationship.

Branleuse · 06/09/2025 18:45

No point leaving a 25yr old relationship for cheating and then trying to make it work with this dickhead. Hes not the one.

Pinkpommebear · 06/09/2025 18:48

Suneptune · 06/09/2025 00:23

I have been with my partner for 9 months. I was married for 25 years and separated and then divorced 5 years ago when my ex informed me out of the blue (to my utter horror and complete shock) that he had slept with multiple women including at least one of his exes (who I considered a friend of mine) and with several women I knew. The divorce was brutal (him not me). I moved away and have not seen him since the separation 5 years ago. I had to make a new life. I did not know who to trust. Life as I knew it had ended. It was tough and lonely. I had a lot of therapy. I didn’t date.

i have always valued fidelity and honesty and my ex knew this. It was one of the reasons he married me he said. I have always said that I could never be with someone who cheated and even my friends I have realised are all faithful types. I suppose like attracts like. Famous last words.

My new partner on our first date told me that he had cheated on his wife 10 years ago and that they had recently divorced (married for 20). He said he was ashamed of his behaviour and regretted what he had done. So I decided to give us a chance. He was loving sweet tender to me.

I then found out that this affair lasted a year and that his affair partner had herself had several affairs during her marriage. The first man involved with her was absolutely “cut up” apparently by their affair ending and he was the second. She has been with her new partner for several years now. His wife found out a year after the affair and he chose to stay with her and their children.

Then he told me over the next few months firstly that he had cheated on his first wife who he was with for 10 years with a random woman who threw herself at him. He also had a fling with someone he met in a pub during his second marriage.

Lastly, I now know that he is still in contact with the affair partner who works for the same organisation as him though in a different office. I thought at first that they saw each other only every so often at the odd social event but it now transpires that last year, they both signed up for a voluntary project (with about a dozen others) and saw each other several times through this. Some weeks after the project was over the two of them then went to a blues club that they had gone to during their affair (her suggestion).

He then started to date me.

Then this summer they both signed up for another voluntary project. I was upset. He told me that she had moved on with her life when I asked what was going on. He said that he had the utmost respect for her in her professional life. He said I was the most important woman to him. He said he needed me to trust him. They saw each other (together with the rest of the team) two or three times a week for this project and there was a lot of socialising in pubs also. On the final very intense day of the project (there was a party afterwards), he didn’t text me at all and not even to say goodnight.

For the last few weeks I feel as if I have been on a choppy sea. He knows this and has said that it was a difficult time for me. He also said that just because I don’t see my ex and the people who betrayed me in my previous life, doesn’t mean that he can’t see her. I said to him that I do not mind him seeing his wives of course not. It was just that I was concerned about the affair partner and that I felt that she was a third party in our relationship. It seems to me (though I didn’t say this to him) that this woman was exactly the sort who my ex husband would have slept with. I don’t want her in my life. My partner told me some ugly details of how they conducted their affair which made me want to cry.

I wonder if he is less loving to me since the ending of the project (doesn’t use my nickname) and the tone of his texts seem to have changed though I could be reading too much into this. He says I am judging him and that he has changed. Do cheats change? Perhaps for him she’s the one who got away? What about the project next year? There’s other stuff but I have gone on enough.

If you are feeling like this at this stage, imagine a few years.
Id never trust him. It isnt worth it.

mindutopia · 06/09/2025 19:02

I didn’t even read all that. You lost me at he cheated on his first wife. You said it’s a dealbreaker for you. So don’t tolerate this crap. No way I’d be in a serious relationship with someone I knew was unfaithful. Not as a proper grown up. At 9 months, everything should be heady and amazing. In the bin he goes.

outerspacepotato · 06/09/2025 19:52

Your new bf is still involved with his affair partner and will continue to be whether you like it or not. They work together at times and they date when they do.

If cheating was a deal breaker for you you would have stopped seeing him once you found out cheating is his norm. It's not like he kept it secret. You kept seeing him because you thought you were different and you want a relationship. For all you know, you could be the other woman.

You're wasting your time and energy and self respect with this guy.

savethatkitty · 06/09/2025 20:01

Buzzy1234 · 06/09/2025 01:47

Don’t date cheaters. And don’t assume because they’re honest about it they’re remorseful.

This.

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